问题
单项选择题 B1型题
强心苷内酯环开裂，加酸后不可再环合，宜选择（）
A.碳酸氢钠水溶液
B.氢氧化钠水溶液
C.碳酸钠水溶液
D.碳酸氢钾水溶液
E.氢氧化钠醇溶液
答案
参考答案：E
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强心苷内酯环开裂，加酸后不可再环合，宜选择（）
A.碳酸氢钠水溶液
B.氢氧化钠水溶液
C.碳酸钠水溶液
D.碳酸氢钾水溶液
E.氢氧化钠醇溶液
参考答案：E
| 阅读理解。 | ||||
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| 1. If you lost your backpack, you may call _______. | ||||
| A. Linda B. Karen C. Nick D. Tim | ||||
| 2. Who lost his school ID card? | ||||
| A. Tony B. Nick C. Linda D. Karen | ||||
| 3. If you want to find your set of keys, Please call _______. | ||||
| A. Karen B. Nick C. Tim D. Tony | ||||
| 4. Tony's school ID card is lost, his telephone number is _______. | ||||
| A. 8793568 B. 8572360 C. 8973658 D. 8973568 |